teichmann@5861: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5861:  * Software engineering by Intevation GmbH
teichmann@5861:  *
teichmann@5861:  * This file is Free Software under the GNU AGPL (>=v3) 
teichmann@5861:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5861:  * documentation coming with Dive4Elements River for details. 
teichmann@5861:  */
teichmann@5861: 
teichmann@5835: package org.dive4elements.river.client.client.ui.chart;
ingo@521: 
ingo@521: import com.google.gwt.core.client.GWT;
ingo@538: import com.google.gwt.user.client.rpc.AsyncCallback;
ingo@610: import com.smartgwt.client.types.Overflow;
ingo@521: import com.smartgwt.client.widgets.Canvas;
ingo@521: import com.smartgwt.client.widgets.Img;
christian@2983: import com.smartgwt.client.widgets.events.ResizedEvent;
christian@2983: import com.smartgwt.client.widgets.events.ResizedHandler;
ingo@521: import com.smartgwt.client.widgets.layout.HLayout;
ingo@521: import com.smartgwt.client.widgets.layout.VLayout;
ingo@521: 
teichmann@5835: import org.dive4elements.river.client.client.Config;
teichmann@5835: import org.dive4elements.river.client.client.event.OutputParameterChangeEvent;
teichmann@5835: import org.dive4elements.river.client.client.event.OutputParameterChangeHandler;
teichmann@5835: import org.dive4elements.river.client.client.event.PanEvent;
teichmann@5835: import org.dive4elements.river.client.client.event.PanHandler;
teichmann@5835: import org.dive4elements.river.client.client.event.RedrawRequestEvent;
teichmann@5835: import org.dive4elements.river.client.client.event.RedrawRequestEvent.Type;
teichmann@5835: import org.dive4elements.river.client.client.event.RedrawRequestHandler;
teichmann@5835: import org.dive4elements.river.client.client.event.ZoomEvent;
teichmann@5835: import org.dive4elements.river.client.client.event.ZoomHandler;
teichmann@5835: import org.dive4elements.river.client.client.services.ChartInfoService;
teichmann@5835: import org.dive4elements.river.client.client.services.ChartInfoServiceAsync;
teichmann@5835: import org.dive4elements.river.client.client.ui.CollectionView;
teichmann@5835: import org.dive4elements.river.client.client.ui.OutputTab;
teichmann@5835: import org.dive4elements.river.client.shared.Transform2D;
teichmann@5835: import org.dive4elements.river.client.shared.model.Axis;
teichmann@5835: import org.dive4elements.river.client.shared.model.ChartInfo;
teichmann@5835: import org.dive4elements.river.client.shared.model.Collection;
teichmann@5835: import org.dive4elements.river.client.shared.model.OutputMode;
teichmann@5835: import org.dive4elements.river.client.shared.model.ZoomObj;
christian@2983: 
christian@2983: import java.util.Date;
christian@2983: import java.util.HashMap;
christian@2983: import java.util.Map;
christian@2983: import java.util.Stack;
ingo@521: 
ingo@521: 
ingo@521: /**
felix@4037:  * Tab representing and showing one Chart-output (diagram).
felix@1545:  *
ingo@521:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@521:  */
ingo@531: public class ChartOutputTab
ingo@531: extends      OutputTab
felix@855: implements   ResizedHandler,
felix@855:              OutputParameterChangeHandler,
felix@855:              ZoomHandler,
felix@858:              PanHandler,
felix@858:              RedrawRequestHandler
ingo@531: {
ingo@521:     public static final int DEFAULT_CHART_WIDTH  = 600;
ingo@521:     public static final int DEFAULT_CHART_HEIGHT = 500;
ingo@521: 
christian@3717:     public static final int THEMEPANEL_MIN_WIDTH = 250;
ingo@527: 
felix@855:     /** The service that is used to fetch chart information. */
ingo@538:     protected ChartInfoServiceAsync info = GWT.create(ChartInfoService.class);
ingo@538: 
ingo@552:     /** The ChartInfo object that provides information about the current
felix@855:      * chart. */
ingo@552:     protected ChartInfo chartInfo;
ingo@552: 
felix@4037:     /** Transformer used to transform image pixels into chart (data) coordinates. */
ingo@561:     protected Transform2D[] transformer;
ingo@538: 
ingo@538:     /** The collection view.*/
ingo@538:     protected CollectionView view;
ingo@538: 
felix@1579:     /** The ThemePanel to expose control over themes (facettes). */
ingo@911:     protected ChartThemePanel ctp;
ingo@911: 
felix@855:     /** The canvas that wraps the chart toolbar. */
raimund@2936:     protected ChartToolbar tbarPanel;
ingo@521: 
felix@855:     /** The canvas that wraps the theme editor. */
ingo@521:     protected Canvas left;
ingo@521: 
felix@855:     /** The canvas that wraps the chart. */
ingo@521:     protected Canvas right;
ingo@521: 
ingo@610:     protected Img chart;
ingo@610: 
felix@855:     /** Chart zoom options. */
ingo@561:     protected int[] xrange;
ingo@561:     protected int[] yrange;
ingo@561: 
felix@1579:     /** Stack of ZoomObj to allow 'redo last zoom'-kind of actions. */
ingo@1280:     protected Stack<ZoomObj> zoomStack;
ingo@1597:     protected Number[]       zoom;
ingo@542: 
ingo@542: 
ingo@521:     /**
ingo@521:      * The default constructor to create a new ChartOutputTab.
ingo@521:      *
ingo@521:      * @param title The title of this tab.
ingo@521:      * @param collection The Collection which this chart belongs to.
ingo@521:      * @param mode The OutputMode.
felix@858:      * @param collectionView The shown collection.
ingo@521:      */
ingo@521:     public ChartOutputTab(
sascha@615:         String         title,
ingo@521:         Collection     collection,
ingo@521:         OutputMode     mode,
ingo@521:         CollectionView collectionView
ingo@521:     ){
ingo@1364:         super(title, collection, collectionView, mode);
ingo@521: 
ingo@538:         view      = collectionView;
ingo@521:         left      = new Canvas();
ingo@521:         right     = new Canvas();
ingo@561:         xrange    = new int[2];
ingo@561:         yrange    = new int[2];
ingo@1280:         zoomStack = new Stack<ZoomObj>();
ingo@521: 
ingo@1597:         zoom = new Number[] {
felix@3694:             new Double(0), new Double(1),
felix@3694:             new Double(0), new Double(1) };
ingo@1597: 
christian@3532:         left.setBorder("1px solid gray");
ingo@527:         left.setWidth(THEMEPANEL_MIN_WIDTH);
ingo@527:         left.setMinWidth(THEMEPANEL_MIN_WIDTH);
ingo@521:         right.setWidth("*");
ingo@521: 
ingo@521:         VLayout vLayout = new VLayout();
ingo@521:         vLayout.setMembersMargin(2);
ingo@521: 
ingo@521:         HLayout hLayout = new HLayout();
ingo@521:         hLayout.setWidth100();
ingo@521:         hLayout.setHeight100();
ingo@521:         hLayout.setMembersMargin(10);
ingo@521: 
ingo@521:         hLayout.addMember(left);
ingo@521:         hLayout.addMember(right);
ingo@521: 
ingo@3370:         ctp = createThemePanel(mode, collectionView);
ingo@3370:         if (ctp != null) {
ingo@3370:             ctp.addRedrawRequestHandler(this);
ingo@3370:             ctp.addOutputParameterChangeHandler(this);
ingo@3370:             left.addChild(ctp);
felix@858:         }
felix@858:         else {
ingo@3370:             left.setVisible(false);
felix@858:         }
felix@858: 
ingo@610:         chart = createChartImg();
ingo@610:         right.addChild(chart);
ingo@610:         right.setOverflow(Overflow.HIDDEN);
sascha@3547: 
christian@3532:         left.setShowResizeBar(true);
ingo@521: 
ingo@3370:         tbarPanel = createChartToolbar(this);
ingo@521:         vLayout.addMember(tbarPanel);
ingo@521:         vLayout.addMember(hLayout);
christian@3717:         vLayout.setOverflow(Overflow.HIDDEN);
ingo@521: 
ingo@521:         setPane(vLayout);
ingo@521: 
ingo@521:         right.addResizedHandler(this);
ingo@521:     }
sascha@3371: 
sascha@3371: 
ingo@3370:     public ChartThemePanel createThemePanel(
ingo@3370:         OutputMode mode, CollectionView view
ingo@3370:     ) {
ingo@3370:         // Output "cross_section" needs slightly modified ThemePanel
ingo@3370:         // (with action buttons).
ingo@3370:         if (mode.getName().equals("cross_section")) {
ingo@3370:             return new CrossSectionChartThemePanel(mode, view);
ingo@3370:         }
ingo@3370:         else {
ingo@3370:             return new ChartThemePanel(mode, view);
ingo@3370:         }
ingo@3370:     }
sascha@3371: 
sascha@3371: 
ingo@3370:     public ChartToolbar createChartToolbar(ChartOutputTab tab) {
ingo@3370:         return new ChartToolbar(tab);
ingo@3370:     }
ingo@521: 
ingo@521: 
christian@2983:     public void toggleThemePanel() {
christian@2983:         this.left.setVisible(!left.isVisible());
christian@2983:     }
christian@2983: 
christian@2983: 
ingo@521:     /**
ingo@521:      * This method is called after the chart panel has resized. It removes the
ingo@521:      * chart - if existing - and requests a new one with adjusted size.
ingo@521:      *
ingo@521:      * @param event The resize event.
ingo@521:      */
christian@2983:     @Override
ingo@521:     public void onResized(ResizedEvent event) {
ingo@531:         updateChartPanel();
ingo@561:         updateChartInfo();
ingo@531:     }
ingo@531: 
ingo@531: 
felix@1550:     /** For RESET type of events, just reset the ranges, otherwise do a
felix@1550:      * complete refresh of panel, info and collection. */
christian@2983:     @Override
ingo@911:     public void onRedrawRequest(RedrawRequestEvent event) {
ingo@911:         if (event.getType() == Type.RESET) {
ingo@911:             resetRanges();
ingo@911:         }
ingo@911:         else {
ingo@911:             ctp.updateCollection();
ingo@911:             updateChartPanel();
ingo@911:             updateChartInfo();
ingo@911:         }
felix@858:     }
felix@858: 
felix@858: 
ingo@531:     /**
ingo@531:      * Listens to change event in the chart them panel and updates chart after
ingo@531:      * receiving such an event.
ingo@531:      *
ingo@531:      * @param event The OutputParameterChangeEvent.
ingo@531:      */
christian@2983:     @Override
ingo@531:     public void onOutputParameterChanged(OutputParameterChangeEvent event) {
raimund@2477:         updateChartInfo();
ingo@531:         updateChartPanel();
ingo@531:     }
ingo@531: 
ingo@531: 
ingo@538:     /**
ingo@541:      * Listens to zoom events and refreshes the current chart in such case.
ingo@541:      *
ingo@541:      * @param evt The ZoomEvent that stores the coordinates for zooming.
ingo@541:      */
christian@2983:     @Override
ingo@541:     public void onZoom(ZoomEvent evt) {
ingo@1280:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1280: 
ingo@561:         xrange[0] = evt.getStartX();
ingo@561:         xrange[1] = evt.getEndX();
ingo@561:         yrange[0] = evt.getStartY();
ingo@561:         yrange[1] = evt.getEndY();
ingo@541: 
ingo@561:         xrange[0] = xrange[0] < xrange[1] ? xrange[0] : xrange[1];
ingo@561:         yrange[0] = yrange[0] < yrange[1] ? yrange[0] : yrange[1];
ingo@541: 
ingo@561:         translateCoordinates();
ingo@561: 
ingo@561:         updateChartInfo();
ingo@542:         updateChartPanel();
ingo@541:     }
ingo@541: 
ingo@541: 
ingo@1597:     protected Number[] translateCoordinates() {
ingo@561:         if (xrange == null || (xrange[0] == 0 && xrange[1] == 0)) {
ingo@561:             zoom[0] = 0d;
ingo@561:             zoom[1] = 1d;
ingo@561:         }
ingo@561:         else {
ingo@561:             translateXCoordinates();
ingo@561:         }
ingo@561: 
ingo@561:         if (yrange == null || (yrange[0] == 0 && yrange[1] == 0)) {
ingo@561:             zoom[2] = 0d;
ingo@561:             zoom[3] = 1d;
ingo@561:         }
ingo@561:         else {
ingo@561:             translateYCoordinates();
ingo@561:         }
ingo@561: 
ingo@561:         return zoom;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     protected void translateXCoordinates() {
ingo@561:         Axis xAxis = chartInfo.getXAxis(0);
ingo@561: 
ingo@1597:         Number xmin   = xAxis.getMin();
ingo@1597:         Number xmax   = xAxis.getMax();
ingo@1597:         Number xRange = subtract(xmax, xmin);
ingo@561: 
ingo@561:         Transform2D transformer = getTransformer(0);
ingo@561: 
ingo@561:         double[] start = transformer.transform(xrange[0], yrange[0]);
ingo@561:         double[] end   = transformer.transform(xrange[1], yrange[1]);
ingo@561: 
ingo@1597:         zoom[0] = divide(subtract(start[0], xmin), xRange);
ingo@1597:         zoom[1] = divide(subtract(end[0], xmin), xRange);
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     protected void translateYCoordinates() {
ingo@561:         Axis yAxis = chartInfo.getYAxis(0);
ingo@561: 
ingo@1597:         Number ymin   = yAxis.getMin();
ingo@1597:         Number ymax   = yAxis.getMax();
ingo@1597:         Number yRange = subtract(ymax, ymin);
ingo@561: 
ingo@561:         Transform2D transformer = getTransformer(0);
ingo@561: 
ingo@561:         double[] start = transformer.transform(xrange[0], yrange[0]);
ingo@561:         double[] end   = transformer.transform(xrange[1], yrange[1]);
ingo@561: 
ingo@1597:         zoom[2] = divide(subtract(start[1], ymin), yRange);
ingo@1597:         zoom[3] = divide(subtract(end[1], ymin), yRange);
ingo@561:     }
ingo@561: 
ingo@561: 
christian@2983:     @Override
ingo@552:     public void onPan(PanEvent event) {
ingo@561:         if (chartInfo == null) {
sascha@555:             return;
sascha@555:         }
ingo@561: 
ingo@552:         int[] start = event.getStartPos();
ingo@552:         int[] end   = event.getEndPos();
ingo@552: 
ingo@561:         Transform2D t = getTransformer();
ingo@552: 
ingo@561:         double[] ts = t.transform(start[0], start[1]);
ingo@561:         double[] tt = t.transform(end[0], end[1]);
ingo@552: 
ingo@561:         double diffX = ts[0] - tt[0];
ingo@561:         double diffY = ts[1] - tt[1];
ingo@561: 
ingo@552:         Axis xAxis = chartInfo.getXAxis(0);
ingo@552:         Axis yAxis = chartInfo.getYAxis(0);
ingo@552: 
ingo@1597:         Number[] x = panAxis(xAxis, diffX);
ingo@1597:         Number[] y = panAxis(yAxis, diffY);
ingo@552: 
felix@3694:         // Set the zoom coordinates.
ingo@561:         zoom[0] = x[0];
ingo@561:         zoom[1] = x[1];
ingo@561:         zoom[2] = y[0];
ingo@561:         zoom[3] = y[1];
ingo@561: 
ingo@561:         updateChartInfo();
ingo@552:         updateChartPanel();
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@1597:     protected Number[] panAxis(Axis axis, double diff) {
ingo@1597:         Number min = axis.getFrom();
ingo@1597:         Number max = axis.getTo();
ingo@561: 
ingo@1597:         min = add(min, diff);
ingo@1597:         max = add(max, diff);
ingo@561: 
ingo@561:         return computeZoom(axis, min, max);
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@543:     public void resetRanges() {
ingo@1281:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1281: 
ingo@561:         zoom[0] = 0d;
ingo@561:         zoom[1] = 1d;
ingo@561:         zoom[2] = 0d;
ingo@561:         zoom[3] = 1d;
ingo@543: 
ingo@561:         updateChartInfo();
ingo@543:         updateChartPanel();
ingo@543:     }
ingo@543: 
ingo@543: 
ingo@541:     /**
ingo@1281:      * This method zooms the current chart out by a given <i>factor</i>.
ingo@1281:      *
ingo@1281:      * @param factor The factor should be between 0-100.
ingo@1281:      */
ingo@1281:     public void zoomOut(int factor) {
ingo@1281:         if (factor < 0 || factor > 100 || chartInfo == null) {
ingo@1281:             return;
ingo@1281:         }
ingo@1281: 
ingo@1281:         zoomStack.push(new ZoomObj(zoom[0], zoom[1], zoom[2], zoom[3]));
ingo@1281: 
ingo@1281:         Axis xAxis = chartInfo.getXAxis(0);
ingo@1281:         Axis yAxis = chartInfo.getYAxis(0);
ingo@1281: 
ingo@1597:         Number[] x = zoomAxis(xAxis, factor);
ingo@1597:         Number[] y = zoomAxis(yAxis, factor);
ingo@1281: 
ingo@1281:         zoom[0] = x[0];
ingo@1281:         zoom[1] = x[1];
ingo@1282:         zoom[2] = y[0];
ingo@1281:         zoom[3] = y[1];
ingo@1281: 
ingo@1281:         updateChartInfo();
ingo@1281:         updateChartPanel();
ingo@1281:     }
ingo@1281: 
ingo@1281: 
ingo@1281:     /**
felix@2542:      * This method is used to zoom out. Zooming out is realized with a stacked
ingo@1280:      * logic. Initially, you cannot zoom out. For each time you start a zoom-in
ingo@1280:      * action, the extent of the chart is stored and pushed onto a stack. A
felix@2542:      * zoom-out will now lead you to the last extent that is popped from stack.
ingo@544:      */
ingo@1280:     public void zoomOut() {
ingo@1280:         if (!zoomStack.empty()) {
ingo@1280:             zoom = zoomStack.pop().getZoom();
ingo@548: 
ingo@1280:             updateChartInfo();
ingo@1280:             updateChartPanel();
ingo@1280:         }
ingo@544:     }
ingo@544: 
ingo@544: 
ingo@1597:     public Number[] zoomAxis(Axis axis, int factor) {
ingo@1282:         GWT.log("Prepare Axis for zooming (factor: " + factor + ")");
ingo@561: 
ingo@1597:         Number min   = axis.getMin();
ingo@1597:         Number max   = axis.getMax();
ingo@1597:         Number range = isBigger(max, min) ? subtract(max, min) : subtract(min, max);
ingo@561: 
ingo@1597:         Number curFrom = axis.getFrom();
ingo@1597:         Number curTo   = axis.getTo();
ingo@561: 
ingo@1597:         Number diff = isBigger(curTo, curFrom)
ingo@1597:             ? subtract(curTo, curFrom)
ingo@1597:             : subtract(curFrom, curTo);
ingo@1282: 
ingo@1282:         GWT.log("    max from    : " + min);
ingo@1282:         GWT.log("    max to      : " + max);
ingo@1282:         GWT.log("    max range   : " + range);
ingo@1282:         GWT.log("    current from: " + curFrom);
ingo@1282:         GWT.log("    current to  : " + curTo);
ingo@1282:         GWT.log("    current diff: " + diff);
ingo@1282: 
ingo@1597:         Number newFrom = subtract(curFrom, divide(multi(diff, factor), 100));
ingo@1597:         Number newTo   = add(curTo, divide(multi(diff, factor), 100));
ingo@1282: 
ingo@1282:         GWT.log("    new from: " + newFrom);
ingo@1282:         GWT.log("    new to  : " + newTo);
ingo@1282: 
ingo@1597:         return new Number[] {
ingo@1597:             divide(subtract(newFrom, min), range),
ingo@1597:             divide(subtract(newTo, min), range)
ingo@1282:         };
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@1597:     public static Number[] computeZoom(Axis axis, Number min, Number max) {
felix@3694:         Number[] hereZoom = new Number[2];
ingo@561: 
ingo@1597:         Number absMin = axis.getMin();
ingo@1597:         Number absMax = axis.getMax();
ingo@1597:         Number diff   = isBigger(absMax, absMin)
ingo@1597:             ? subtract(absMax, absMin)
ingo@1597:             : subtract(absMin, absMax);
ingo@561: 
felix@3694:         hereZoom[0] = divide(subtract(min, absMin), diff);
felix@3694:         hereZoom[1] = divide(subtract(max, absMin), diff);
ingo@561: 
felix@3694:         return hereZoom;
ingo@561:     }
ingo@561: 
ingo@561: 
felix@1551:     /** Get Collection from ChartThemePanel. .*/
felix@1551:     public Collection getCtpCollection() {
felix@1551:         return this.ctp.getCollection();
felix@1551:     }
felix@1551: 
felix@1551: 
ingo@544:     /**
ingo@538:      * Updates the Transform2D object using the chart info service.
ingo@538:      */
ingo@561:     public void updateChartInfo() {
ingo@538:         Config config = Config.getInstance();
ingo@538:         String locale = config.getLocale();
ingo@538: 
ingo@538:         info.getChartInfo(
ingo@538:             view.getCollection(),
ingo@538:             locale,
ingo@538:             mode.getName(),
ingo@549:             getChartAttributes(),
ingo@552:             new AsyncCallback<ChartInfo>() {
christian@2983:                 @Override
ingo@538:                 public void onFailure(Throwable caught) {
ingo@610:                     GWT.log("ChartInfo ERROR: " + caught.getMessage());
ingo@538:                 }
ingo@538: 
christian@2983:                 @Override
ingo@552:                 public void onSuccess(ChartInfo chartInfo) {
ingo@552:                     setChartInfo(chartInfo);
ingo@538:                 }
ingo@538:             });
ingo@538:     }
ingo@538: 
ingo@538: 
ingo@531:     public void updateChartPanel() {
ingo@610:         int w = right.getWidth();
ingo@610:         int h = right.getHeight();
ingo@521: 
ingo@610:         chart.setSrc(getImgUrl(w, h));
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@542:     /**
ingo@542:      * Returns the existing chart panel.
ingo@542:      *
ingo@542:      * @return the existing chart panel.
ingo@542:      */
ingo@534:     public Canvas getChartPanel() {
ingo@610:         return right;
ingo@610:     }
ingo@538: 
ingo@538: 
felix@4037:     /** Access the Canvas holding the rendered Chart. */
ingo@610:     public Canvas getChartImg() {
ingo@610:         return chart;
ingo@538:     }
ingo@538: 
ingo@538: 
felix@4037:     /** Get associated ChartInfo object. */
ingo@552:     public ChartInfo getChartInfo() {
ingo@552:         return chartInfo;
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@552:     protected void setChartInfo(ChartInfo chartInfo) {
ingo@552:         this.chartInfo = chartInfo;
ingo@561:     }
ingo@561: 
ingo@561: 
ingo@561:     public Transform2D getTransformer() {
felix@4037:         return getTransformer(0);
ingo@552:     }
ingo@552: 
ingo@552: 
ingo@538:     /**
ingo@538:      * Returns the Transform2D object used to transform image coordinates into
felix@4037:      * chart (data) coordinates.
ingo@538:      *
ingo@561:      * @param pos The index of a specific transformer.
ingo@561:      *
ingo@538:      * @return the Transform2D object.
ingo@538:      */
ingo@561:     public Transform2D getTransformer(int pos) {
ingo@561:         if (chartInfo == null) {
ingo@561:             return null;
ingo@561:         }
ingo@538: 
ingo@561:         return chartInfo.getTransformer(pos);
ingo@534:     }
ingo@534: 
ingo@534: 
ingo@542:     /**
felix@2542:      * Returns the Transform2D count.
raimund@2477:      *
raimund@2477:      * @return the Transformer2D count
raimund@2477:      */
raimund@2477:     public int getTransformerCount() {
raimund@2477:         if (chartInfo == null) {
raimund@2477:             return 0;
raimund@2477:         }
raimund@2477: 
raimund@2477:         return chartInfo.getTransformerCount();
raimund@2477:     }
raimund@2477: 
raimund@2477: 
raimund@2477:     /**
ingo@542:      * Creates a new chart panel with default size.
ingo@542:      *
ingo@542:      * @return the created chart panel.
ingo@542:      */
ingo@610:     protected Img createChartImg() {
ingo@610:         return createChartImg(DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT);
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@542:     /**
ingo@542:      * Creates a new chart panel with specified width and height.
ingo@542:      *
ingo@542:      * @param width The width for the chart panel.
ingo@542:      * @param height The height for the chart panel.
ingo@542:      *
ingo@542:      * @return the created chart panel.
ingo@542:      */
ingo@610:     protected Img createChartImg(int width, int height) {
ingo@521:         Img chart  = getChartImg(width, height);
ingo@521:         chart.setWidth100();
ingo@521:         chart.setHeight100();
ingo@521: 
ingo@521:         return chart;
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@521:     /**
ingo@521:      * Builds the chart image and returns it.
ingo@521:      *
ingo@521:      * @param width The chart width.
ingo@521:      * @param height The chart height.
ingo@521:      *
ingo@521:      * @return the chart image.
ingo@521:      */
ingo@521:     protected Img getChartImg(int width, int height) {
ingo@521:         return new Img(getImgUrl(width, height));
ingo@521:     }
ingo@521: 
ingo@521: 
ingo@521:     /**
ingo@521:      * Builds the URL that points to the chart image.
ingo@521:      *
ingo@521:      * @param width The width of the requested chart.
ingo@521:      * @param height The height of the requested chart.
ingo@542:      * @param xr Optional x range (used for zooming).
ingo@542:      * @param yr Optional y range (used for zooming).
ingo@521:      *
ingo@521:      * @return the URL to the chart image.
ingo@521:      */
ingo@521:     protected String getImgUrl(int width, int height) {
ingo@521:         Config config = Config.getInstance();
ingo@521: 
ingo@521:         String imgUrl = GWT.getModuleBaseURL();
ingo@521:         imgUrl += "chart";
ingo@521:         imgUrl += "?uuid=" + collection.identifier();
ingo@521:         imgUrl += "&type=" + mode.getName();
ingo@521:         imgUrl += "&locale=" + config.getLocale();
ingo@521:         imgUrl += "&timestamp=" + new Date().getTime();
ingo@521:         imgUrl += "&width=" + Integer.toString(width);
ingo@521:         imgUrl += "&height=" + Integer.toString(height);
ingo@521: 
ingo@1597:         Number[] zoom = getZoomValues();
ingo@542: 
ingo@561:         if (zoom != null) {
ingo@1597:             if (zoom[0].intValue() != 0 || zoom[1].intValue() != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@1597:                 imgUrl += "&minx=" + zoom[0];
ingo@1597:                 imgUrl += "&maxx=" + zoom[1];
ingo@612:             }
ingo@2391: 
ingo@1597:             if (zoom[2].intValue() != 0 || zoom[3].intValue() != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@1597:                 imgUrl += "&miny=" + zoom[2];
ingo@1597:                 imgUrl += "&maxy=" + zoom[3];
ingo@612:             }
ingo@542:         }
ingo@542: 
ingo@521:         return imgUrl;
ingo@521:     }
ingo@549: 
ingo@549: 
felix@2542:     /** Get link to export image in given dimension and format. */
ingo@1344:     public String getExportUrl(int width, int height, String format) {
ingo@1344:         String url = getImgUrl(width, height);
ingo@1344:         url += "&format=" + format;
ingo@1344:         url += "&export=true";
ingo@1344: 
ingo@1344:         return url;
ingo@1344:     }
ingo@1344: 
ingo@1344: 
raimund@2936:     public Map <String, String> getChartAttributes() {
ingo@549:         Map<String, String> attr = new HashMap<String, String>();
ingo@549: 
ingo@549:         Canvas chart = getChartPanel();
felix@1453:         attr.put("width",  chart.getWidth().toString());
ingo@549:         attr.put("height", chart.getHeight().toString());
ingo@549: 
ingo@1597:         Number[] zoom = getZoomValues();
ingo@549: 
ingo@561:         if (zoom != null) {
ingo@1597:             if (zoom[0].intValue() != 0 || zoom[1].intValue() != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@1597:                 attr.put("minx", zoom[0].toString());
ingo@1597:                 attr.put("maxx", zoom[1].toString());
ingo@612:             }
ingo@1597:             if (zoom[2].intValue() != 0 || zoom[3].intValue() != 1) {
ingo@612:                 // a zoom range of 0-1 means displaying the whole range. In such
ingo@612:                 // case we don't need to zoom.
ingo@1597:                 attr.put("miny", zoom[2].toString());
ingo@1597:                 attr.put("maxy", zoom[3].toString());
ingo@612:             }
ingo@549:         }
ingo@549: 
ingo@549:         return attr;
ingo@549:     }
ingo@561: 
ingo@561: 
ingo@1597:     protected Number[] getZoomValues() {
ingo@561:         return zoom;
ingo@561:     }
felix@1545: 
felix@1545: 
felix@1545:     /** Return the 'parent' CollectionView. */
felix@1545:     public CollectionView getView() {
felix@1545:         return this.view;
felix@1545:     }
ingo@1597: 
ingo@1597: 
ingo@1597:     public static Number subtract(Number left, Number right) {
ingo@1597:         if (left instanceof Double) {
ingo@1597:             return new Double(left.doubleValue() - right.doubleValue());
ingo@1597:         }
ingo@1597:         else if (left instanceof Long) {
ingo@1597:             return new Long(left.longValue() - right.longValue());
ingo@1597:         }
ingo@1597:         else {
ingo@1597:             return new Integer(left.intValue() - right.intValue());
ingo@1597:         }
ingo@1597:     }
ingo@1597: 
ingo@1597: 
felix@3694:     /** Add two numbers, casting to Type of param left. */
ingo@1597:     public static Number add(Number left, Number right) {
ingo@1597:         if (left instanceof Double) {
ingo@1597:             return new Double(left.doubleValue() + right.doubleValue());
ingo@1597:         }
ingo@1597:         else if (left instanceof Long) {
ingo@1597:             return new Long(left.longValue() + right.longValue());
ingo@1597:         }
ingo@1597:         else {
ingo@1597:             return new Integer(left.intValue() + right.intValue());
ingo@1597:         }
ingo@1597:     }
ingo@1597: 
ingo@1597: 
felix@3694:     /** Divde left by right. Note that Long will be casted to double. */
ingo@1597:     public static Number divide(Number left, Number right) {
ingo@1597:         if (left instanceof Double) {
ingo@1597:             return new Double(left.doubleValue() / right.doubleValue());
ingo@1597:         }
ingo@1597:         else if (left instanceof Long) {
felix@3694:             return new Double(left.doubleValue() / right.doubleValue());
ingo@1597:         }
ingo@1597:         else {
ingo@1597:             return new Integer(left.intValue() / right.intValue());
ingo@1597:         }
ingo@1597:     }
ingo@1597: 
ingo@1597: 
ingo@1597:     public static Number multi(Number left, Number right) {
ingo@1597:         if (left instanceof Double) {
ingo@1597:             return new Double(left.doubleValue() * right.doubleValue());
ingo@1597:         }
ingo@1597:         else if (left instanceof Long) {
ingo@1597:             return new Long(left.longValue() * right.longValue());
ingo@1597:         }
ingo@1597:         else {
ingo@1597:             return new Integer(left.intValue() * right.intValue());
ingo@1597:         }
ingo@1597:     }
ingo@1597: 
ingo@1597: 
ingo@1597:     public static boolean isBigger(Number left, Number right) {
ingo@1597:         if (left instanceof Double) {
ingo@1597:             return left.doubleValue() > right.doubleValue();
ingo@1597:         }
ingo@1597:         else if (left instanceof Long) {
ingo@1597:             return left.longValue() > right.longValue();
ingo@1597:         }
ingo@1597:         else {
ingo@1597:             return left.intValue() > right.intValue();
ingo@1597:         }
ingo@1597:     }
ingo@521: }
ingo@521: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :